The document discusses the steps to draw assembly drawings from details drawings and vice versa. It outlines examining individual part features, choosing appropriate scales, drawing views in sequence of assembly, and adding dimensions and notes. It also notes visualizing arrangements of parts in assemblies and selecting minimum views to describe parts completely. The document then provides 30 examples of assemblies and their corresponding details drawings.
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Assembly and Details machine drawing pdf
1. CHAPTER - 06 ASSEMBLY AND DETAILS DRAWING.
A] STEPS TO DRAW ASSEMBLY DRAWING FROM DETAILS DRAWING:-
1. Understand the purpose, principle of operation and field of application of the given machine.
This will help in understanding the functional requirements of individual parts and their
location.
2. Examine thoroughly, the external and internal features of the individual parts.
3. Choose a proper scale for the assembly drawing.
4. Estimate the overall dimensions of the views of the assembly drawing and make the outline
blocks for each of the required view, leaving enough space between them, for indicating
dimensions and adding required notes.
5. Draw the axes of symmetry for all the views of the assembly drawing.
6. Begin with the view from the front, by drawing first, the main parts of the machine and then
adding the rest of the parts, in the sequence of assembly.
7. Project the other required views from the view from the front complete views.
8. Mark the location and overall dimensions and add the part numbers on the drawing.
9. Prepare the parts list.
B] STEPS TO DRAW PART OR DETAILS DRAWING FROM ASSEMBLY
DRAWING:-
1. Understand the assembly drawing thoroughly, by referring to the parts list and the different
orthographic views of the unit.
2. Study the functional aspect of the unit as a whole. This will enable to understand the
arrangement of the parts.
3. Visualize the size and shape of the individual components.
4. As far as possible, choose full scale for the drawing. Small parts and complicated shapes may
require the use of enlarged scales so that their presentation will have a balanced appearance.
5. Select the minimum number of views required for describing each part completely. The view
from the front selected must provide maximum information of the part.
6. The under mentioned sequence may be followed for preparing different views of each part :
(i) Draw the main centre lines and make outline blocks, using the overall dimensions of the
views.
(ii) Draw the main circles and arcs of the circles.
(iii) Draw the main outlines and add all the internal features.
(iv) Cross-hatch the sectional views.
(v) Draw the dimension lines and add dimensions and notes.
7. Check the dimensions of the mating parts.
8. Prepare the parts list.
![CHAPTER - 06 ASSEMBLY AND DETAILS DRAWING.
A] STEPS TO DRAW ASSEMBLY DRAWING FROM DETAILS DRAWING:-
1. Understand the purpose, principle of operation and field of application of the given machine.
This will help in understanding the functional requirements of individual parts and their
location.
2. Examine thoroughly, the external and internal features of the individual parts.
3. Choose a proper scale for the assembly drawing.
4. Estimate the overall dimensions of the views of the assembly drawing and make the outline
blocks for each of the required view, leaving enough space between them, for indicating
dimensions and adding required notes.
5. Draw the axes of symmetry for all the views of the assembly drawing.
6. Begin with the view from the front, by drawing first, the main parts of the machine and then
adding the rest of the parts, in the sequence of assembly.
7. Project the other required views from the view from the front complete views.
8. Mark the location and overall dimensions and add the part numbers on the drawing.
9. Prepare the parts list.
B] STEPS TO DRAW PART OR DETAILS DRAWING FROM ASSEMBLY
DRAWING:-
1. Understand the assembly drawing thoroughly, by referring to the parts list and the different
orthographic views of the unit.
2. Study the functional aspect of the unit as a whole. This will enable to understand the
arrangement of the parts.
3. Visualize the size and shape of the individual components.
4. As far as possible, choose full scale for the drawing. Small parts and complicated shapes may
require the use of enlarged scales so that their presentation will have a balanced appearance.
5. Select the minimum number of views required for describing each part completely. The view
from the front selected must provide maximum information of the part.
6. The under mentioned sequence may be followed for preparing different views of each part :
(i) Draw the main centre lines and make outline blocks, using the overall dimensions of the
views.
(ii) Draw the main circles and arcs of the circles.
(iii) Draw the main outlines and add all the internal features.
(iv) Cross-hatch the sectional views.
(v) Draw the dimension lines and add dimensions and notes.
7. Check the dimensions of the mating parts.
8. Prepare the parts list.](https://image.slidesharecdn.com/finalaanddsjs-161006045209/85/Assembly-and-Details-machine-drawing-pdf-1-320.jpg)
![1] PLUMMER BLOCK (PEDASTAL BEARING)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)